# Relationship history for MSHA mine 1102895

Current hierarchy: **T & T Oil Company Inc; Shakespeare Oil Company Inc → Madison County Sand LLC → Madison County Sand LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Sand Inc → Madison County Sand LLC; 1980-07-24 to 2002-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Quality Sand, Inc. → Madison County Sand LLC; 1990-05-01 to 2010-12-28; source msha-controller-operator-history
- **controller_controls_operator:** Sand Inc → Quality Sand, Inc.; 1990-05-01 to 2002-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Fred Weber, Inc. → Madison County Sand LLC; 2002-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred Weber, Inc. → Quality Sand, Inc.; 2002-08-01 to 2010-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Madison County Sand LLC → Madison County Sand LLC; 2010-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shakespeare Oil Company Inc et al → Madison County Sand LLC; 2010-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shakespeare Oil Company Inc et al → Madison County Sand LLC; 2010-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** T & T Oil Company Inc et al → Madison County Sand LLC; 2010-12-29 to current/open; source msha-controller-operator-history